<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <!-- 准备好一个“容器” -->
	<div id="test"></div>
	
	<!-- 引入react核心库 -->
	<script type="text/javascript" src="../js/react.development.js"></script>
	<!-- 引入react-dom，用于支持react操作DOM -->
	<script type="text/javascript" src="../js/react-dom.development.js"></script>
	<!-- 引入babel，用于将jsx转为js -->
	<script type="text/javascript" src="../js/babel.min.js"></script>

    <script type="text/babel">

        //创建组件
        class Login extends React.Component {

            handleSubmit = (event) => {
                event.preventDefault() //阻止表单提交
				const {username,password} = this
				alert(`你输入的用户名是：${username.value},你输入的密码是：${password.value}`)
            }

            render () {
                return (
                    <form action="" onSubmit={this.handleSubmit}>
                        用户名：<input ref={c => this.username = c} type="text" name="username" />
                        密码：<input ref={c => this.password = c} type="password" name="password"/>
                        <button>登陆</button>
                    </form>
                )
            }
        }

        //渲染组件到页面
        ReactDOM.render(<Login/>, document.getElementById('test'));
    </script>
</body>
</html>